Alfred barclay frack



(No Model.)

ABAPRAGK.

WRENCH.

No. 601,851.. l Patented Apr. 5, 189,8.

cams Pernis co., Puo-rouwo., wAsHmumu. n. c.

mentalities to be fully andclearly described4 with the aid of theaccompanying drawings,

UNITED .STATES- PATENT OFFICE.

ALFRED BARCLAY FRAOK, OF GIRARD, OHIO, ASSIGNOR TO HENRY C:

I MARSHALL, OF SAME PLACE.

WRENCH.

SPECIFICATION forming part of Letters Patent No. 501,851, dated Aprily5, 1898.

Amman fuga cruiyre, 1897. semi No. 645,876. (No model.)

To @ZZ whom #may concern:

Be it known that I, ALFRED BARCLAY FRACK, a citizen of the UnitedStates, residing at Girard, in the county of Trumbull and State of Ohio,have invented certain new and useful Improvements in Wrenches, of whichthe following is a specication, reference being had therein to theaccompanying drawings.

My invention relates to wrenches and is more particularly of that Aclasscommonly known as monkey-wrenches; and itl combines certain mechanicalYparts and instruin Which,-

Figure 1 represents a side elevation of the,

invention. Fig. `2 is an end view thereof. Fig. 3 is a longitudinalsectional vview of Fig. 1. Fig. i is a cross-sectional view upon theline and Fig. 5 isa cross-sectional view upon the line y y of Fig-1.

In the several views the same letter always indicates the same partvoftheinvention.

J represents the head-jaw of a wrench constructed after the manner of myinvention, having a stem comprising a part J 2 of a rectangulartransverse section and an extended part J 3 of a circular transversesection, in the cylindrical surface of which last is recessed the blindspiral groove T, of semicircular contour.

rIfhe twin jaw J of the wrench is provided witha strap Z,embracing theportion J2, and a parallel strap Y, engaging the portion J 3of the stem,the said strap Y continuing into the lug X, with concaved face W, intowhich rests the round portion V of the hollow handle H, mounted upon thestem J 3 and ending in the annular flange U, engaging the circularrecess R of the lug X, and thereby maintained in its position upon thestem.

The annular iiange U is provided witha series of blind slots or recessess, into which may be engaged the sliding key L, dovetailed into thelongitudinal slot s of the lug X.

In the body of the handleH is an opening O, screw-threaded and engagingthe set-screw S, having a rounded recess in its inner end adapted tocontain the ball B, racing in the before-mentioned groove` T.

From the description of the mechanical parts of my invention theoperation thereof will be readily understood to be as followsthat is,the handle H being rotated upon the stem J3 and being firmly held injuxtapositionF to .the jaw J by the engagement of the flange Uvwith itsseat R the stem J 3 will be thrust outward by means ofthe impact of theball B upon the groove T, thereby separating the jaw J fromthe jaw J Thereverse move- :ment will again close the jaws. `The said jaws may bemaintained in any determined position by thrusting the key Linto`engagement with one of the slots s, the slot s being sufficientlylarge to permit the longitudinal play of the said key, and the same maybe 4released by a sliding movement of the thumb upon the said key.

' Having'fully described my invention and itsvoperation, what I desireto secure by Letters Patent and claim is In combination with a. jaw, theintegral stem thereof with ablind helical groove about the said stem, ajaw slidably mounted upon the said stem and having an extended lug withthe key and slot therefor and the circular recess, the hollow handleslidably mounted upon the stem, the annular ange of the said handleengaging the said circular recess, the set-screw threaded into the saidhandle, the hollow end of the-said set-screw, and the ball playing inthe said hollow and in the before-mentioned blind helical groove, allsubstantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

ALFRED BARCLAY FRACK. Witnesses:

L. C. PRoo'roR, E. C. WEAVER.

